JPS62126021A - Belt separating device - Google Patents

Abstract

PURPOSE:To loosen belts in a bundle to surely and stably separate them from each other, by operating an pushing section for pushing the terminal end of a belt in the direction of an escapement having a pair of stoppers, in accordance with a detection signal for the position of a belt. CONSTITUTION:Estimating that a shaft 21 is as a displaced shaft 20, when shafts 21A, 21B are rotated in the direction r2, belts 7B which are fed by the shaft 21 in small groups are fed bit by bit toward the shaft 21B by means of an escapement 30, and therefore, they are separated and conveyed by the shaft 21B so that the belts 7 are discharged one by one from one end of the shaft 21B. If the number of the belts is decreased so that the behavior of the belts vary, but when the rearmost one reaches a predetermined position, a sensor 40 energizes a pushing section 31 to press the belts 7 toward the escapement. Accordingly, the behavior of the belts falls in the same condition as that as they have a large number, and therefore, it is possible to reduce the scattering of separating ducts.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a device for separating belts, and particularly to a device for separating belts one by one at regular time intervals after loosening belts supplied in a bundle. It is.

(Background of the invention) As a conventional belt separation and sorting device,
22 and Japanese Patent Publication No. 58-11120 have been proposed. The proposal consists of a sorting device that conveys the belt by fitting the belt into a spiral groove provided in a shaft and rotating the shaft, and a supply device that feeds the belt one by one or several belts at a time to the sorting device. The proposal will be explained with reference to FIGS. 9 to 13.

Figure 9 is a perspective view of a conventional belt separation and sorting device, Figures 10 and 1 are bells). An explanatory diagram of the principle of feeding, FIG. 12 is a partially enlarged view of the spiral groove of the shaft, and FIG. 13 is a diagram showing the relationship between the rotational speed of the shaft and the constant feeding speed.

In FIG. 9, the hollow drum 1 is rotatably supported via three sets of rollers 3 rotatably supported by a base 2, and one set of the three rollers 3 is provided with a motor 4. Since the rotation of the drum 1 is transmitted through the timing belt 5, the drum 1 is rotated. A plurality of separating claws 6 are installed in one row in the circumferential direction on the inner surface of the drum 1, and are located on a track along which two ends of the belt 7, one end of which has been pulled up by the separating claws 6, pass. A shaft 8 of a sorting device is disposed within the drum 1 as shown in FIG.

As shown in FIG. 1O, the shaft 8 includes a spiral groove 9 and an engagement groove 10 shallower than the groove 9, and as shown in FIG. It is appropriately engaged with and supported by the roller 12 (31 in the figure). The roller 1
201 pieces are driven by the motor 13.

As shown in Fig. 12, one of the belts 7 has a retaining groove 1 formed on the shaft 8, which is slightly wider than the width of the flat belt 7.
0 and rotates the shaft 8 in the X direction, the flat belt 7 is transferred in the X direction. The flat belt 7 moves forward by a helical pitch P when the shaft 8 rotates once. Therefore, in this method, the straightening speed of the flat belt 7 and the rotational speed of the shaft 8 are proportional as shown in the graph shown in FIG. The shape of the engagement groove 1o is such that both inner sides of the engagement groove 1o are formed into steep slopes so that the flat belt 7 does not protrude from the engagement groove 1o during alignment.

In the conventional technology having the above configuration, when the flat belt 7 is supplied into the drum 1 and the drum 1 is rotated by the motor 4 via the timing belt 5 and the roller 6, the flat belt 7 inside the drum 1 is rotated as follows. One or several of them are caught by the separation claw O and separated. When the drum 1 further rotates, the separation claw 6 catches the Rippei belt 7, and the shaft 8
It is pulled up above the shaft 8 and supplied to the shaft 8. Then, when the shaft 8 is rotated in a predetermined direction (X direction),
The flat belts 7 supplied to the shaft 8 are fitted one by one into the engagement grooves 10 of the shaft 8 and are sequentially transferred in the X direction.

However, in the prior art, when the number of flat belts 7 supplied to the drum 1 increases, the flat belts 7 are stirred by the separating claws 6, so the flat belts 7 become entangled within the drum 1.
There is a risk that the two rods will be supplied to the shaft 8 in an entangled state without being separated one by one.

Also, when the number of flat belts 7 in the drum 1 increases, the separation claws 6
The number of flat belts 7 caught on the shaft 8 also increases, and the flat belts 7 are continuously supplied to the shaft 8, resulting in an oversupply state of the flat belts 7. Therefore, the flat belt 7 is attached to the base frame 1 that supports the shaft 8.
] Since the flat belts 7 are not separated one by one by the time the rollers 12 are in the same position as the rollers 12, several flat belts 7 may be inserted into one engagement groove 10 of the shaft 80, which may cause problems such as the flat belts 7 getting tangled with the rollers 12. What? Ta.

The above-mentioned trouble is caused by a reduction in the belt separation ability due to the engagement groove of the shaft used in the separation and conveying device.

There is a problem in that it requires a great deal of time and effort to solve such problems.

(Objective of the Invention) The present invention solves the problems of the prior art as described above, and makes it possible to unravel belts fed in a bundle and to reliably separate the belts one by one and stably separate the L belts. The purpose of this invention is to provide a belt separating device that can be used.

(Summary of the Invention) In order to achieve the above object, the present invention provides a pair of shafts each having a long-pitch and a short-pitch helical groove that are rotatably provided concentrically and separately; an escapement having a pair of stoppers that alternately move up and down with respect to the boundary of the belt to control the amount of belt feed; a sensor that detects the belt position; and a pressing part that presses the rearmost belt in the direction of the escapement. The belt is characterized in that a predetermined position of the belt is detected by the sensor, and the extrusion section is operated based on the detection signal.

(Example of the invention) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the shaft 20 is constructed by concentrically combining long pitches (shirts with D spiral grooves) 2o, 4 and shirts (shirts with short pitch helical grooves) 2o, E (shirts) 20A, 20B each has a motor 50A,
50E. - force, the shaft 21 also has a shaft 21A having a long-pitch helical groove and a shirt having a short-pitch helical groove, similar to 20)
21 B are concentrically combined, and the shaft 21 A
, 21B are driven by motors 51A and 51B, respectively. The shafts 20, 21 and the motors soA, 50B, stA, 51E are attached to a rotating body 52, and the rotating body 52 is rotatably attached to an index table 53 fixed on a pedestal 54. There is an escapement 30. near the boundary between the shirt) 21 A and zIB. A pressing portion 32 and a sensor 40 are appropriately arranged.

Next, an outline of the operation of this embodiment having the above configuration will be described.

Shirt) Belt 7 in a bundle (50 pieces) from the direction of 2G
When the shafts 20A and 20B are simultaneously rotated at high speed in the 1c r1 direction (clockwise) by the motors 50A and 50fl, respectively, the belt bundle 7
A is transferred in the E direction (rightward). In this state, the index table 53 is operated to reverse the rotating body 52, thereby displacing the shaft 20 to the position of the shaft 21. At this time, it goes without saying that the shaft 21 is displaced to the position of the shaft 20.

Now, for convenience of explanation, it is assumed that the shaft 21 in the drawing is the shaft 20 displaced as described above, and the shaft 21, 4.21B that constitutes the shaft 21 is replaced by the motor 51A.
, 51 B in the counterclockwise direction), the belt 7B, which is divided into small groups and transferred by the shaft 21A, is rotated by the escapement 30.
Shirt) 21 A few pieces are sent to E. The several belts thus sent out are separated and transported by the shaft 21B, and 1 from the tip of the shirt 21E.
Each book is separated and discharged.

In this case, when the number of belts decreases, the behavior of the belts changes, but when the rearmost belt 7 reaches a predetermined position, the sensor 40 activates the pressing part 31 to press the belt 7 in the direction of the escapement 30. . Therefore, the behavior of the belt is the same as when there are many belts, so it is possible to reduce variations in separation tact.

Although the above description has been made regarding the shirt 2G, the same applies to the other shaft 21. Next, regarding one side 21 of the shafts 20 and 21 having the same structure,
Its configuration and operation will be explained in detail with reference to FIGS. 2 and 6.

In the same case, the shaft 21B has a right-handed helical groove with a short pitch slightly wider (1.6 times) than the width of the belt 7, and a shaft 21B with a right-handed screw groove several times the width of the belt 7 (5-2 times).
The shaft 21 is assembled concentrically with the shaft 21
A is integrally connected to a shaft 27 on which a timing pulley is attached, and the pulley A is connected to a motor (
(not shown).

On the other hand, the shirt 21B passes through the center of the shaft 21A and is integrally connected to an intermediate shaft 22 to which a timing pulley 26 is attached, and the pulley 26 is connected to the belt 25.
via a separate motor (not shown).

Therefore, the shafts 21A and 21E are independently rotatable.

An escapement 30 for controlling the feed i of the belt 7 moving from the shirt) 21A to the shirt 21J is provided at the boundary between the shirts) 21A and 21E, and the escapement 30 alternately It is equipped with a pair of stoppers J, 29 that are movable up and down. Behind the escapement 30 (to the right in FIG. 1) is the final belt 7.
A pressing portion 31 for pressing the escapement 30 is provided. The pressing portion 31 has a stopper 32 that moves up and down.
and an actuator 33 that moves the stopper 32 up and down.
and an actuator 34 for driving the stopper 32 and the actuator 33 left and right.

Further, a sensor (for example, a television camera) 40 for detecting a predetermined position of the belt 7 is provided at an upper position near the boundary between the shafts 21A and 21B.

The configuration described above is based on the discovery of the following phenomenon and its countermeasures.

FIG. 4 shows a state in which a flat belt is conveyed using a shaft provided with a spiral groove having a pitch several times the width of the flat belt to be conveyed. In the figure, the shaft 35 is inclined by 1 degree toward the exit E direction. To the shaft 35 (
, 41, when a bundle of about 59 belts 7A is hooked and the shaft 35 is rotated clockwise (arrow γ, force direction), it has been found that the behavior of the belt differs considerably depending on the rotation speed. 35 is low speed (about 20 Orpm)
In this case, the belt bundle 7A descends along the shaft 35 while unraveling as shown in FIG.
0Orpm), a phenomenon of rising as shown in ((1'1) occurred.

Further, in the state shown in the figure (B,), if an obstacle 36 is provided near the exit of the shaft 35, the belt comes into contact with the obstacle 36 as shown in the figure (B,) and becomes a bundle d7A again.

Therefore, we sought conditions for the belt bundle 7A to unravel as it descends, and to maintain its separated state without becoming a bundle even if it hits the obstacle 36K.

As a result, it was confirmed that when the shaft 35 was rotated at about 300 rprn, the belt 7 could remain unraveled even if it was drawn over an obstacle 36. in this case,
The shaft pitch is also 30.

60 and 12011111, which showed the best unraveling state, it was found that the one with a pitch of 120fi was optimal.

In place of the above-mentioned obstacle 36, an escapement 30 having a stopper 29 which can be moved up and down alternately as shown in FIG. At this time, the 70 rows of belts were moved up and down by the rotation of the spiral groove provided on the shaft 35, and each belt 7 was also moved in the left-right direction (
It was also found that the entire length t of the belt 70 rows was constantly changing and vibrating.

In this state, the escapement 30 is operated at a constant tact. Figure 6 (,4
1 to IC1.

First, as shown in Figures 1 and 41, the belts 7, which are continuous in a disjointed manner, are stopped by raising the stopper 4. Then, as shown in FIG. 3B, the escapement 30 is switched, and the stopper 29 is lowered and the stopper 29 is raised at the same time, so that the 7th row of belts advances to the stopper 29 position f. Furthermore, when the escapement 30 is switched and the stopper 28 is raised and the stopper 29 is lowered at the same time, only the belt (1 or 2 belts) that has advanced in FIG. In this way, the belt 7 is separated by repeating the operations shown in FIGS. 11 to 11 (C1) described above. Here, each switching time in Examples 1 to C) is t3 seconds.

When separation is performed from an initial state of 50 belt rows and the number of belts decreases, the traveling speed of the belt becomes slower and the amplitude of the belt increases. This is because when the number of belts is large, the belt at the leading end is pushed by the belt row at the rear, so the forward force increases, but when the number of belts decreases, the force pushing from the rear decreases.

When the number of belts decreases, the traveling speed of the belt decreases, or the amplitude increases, the following phenomenon occurs.

First, in the state shown in FIG. 7U), the belt 7 is moving in the direction of the arrow (to the left). However, because the progress speed is slow, the escape man (30) switches in the state shown in Figure (B).
The belt 7 is pushed back to the state shown in Figure IC+.

Or, in the state of BS, it hits the stopper 29 and moves backward, and then the escapement 30 operates, resulting in the state of C1.Then, when the belt 7 is returned to the position, it starts moving forward again. Figure u) In the state of 1,
Thereafter, the state returns to the state shown in FIG.

In this way, the separation time varies greatly depending on the number of belts, so the dispersion of the belt separation time becomes large.
Stable separation cannot be performed until the end. Therefore,
As shown in FIG. 8, a sensor (television camera) 40 for detecting the belt position and a pressing section 31 for pressing the belt 7 from behind were provided.

With this configuration, the sensor 40 first detects that the number of belts 7 is low and that the belt 7 is pressed by the pressing portion 31 in front of the position of the stopper 32; After being raised 7'c, the belt 7 is pushed in the direction of the escapement 30 to be advanced close to the escapement 30, and the interval between the remaining belts is not widened. If K is set in this way, the width of the belt 7 in the direction of the shaft 35 becomes smaller, resulting in a situation similar to when there are many belts. Furthermore, even if the belt 7 hits the escapement 30 and rebounds as described above, there is no risk that the pressing will come into contact with the stopper 32 and return too far backward. Therefore, even if the number of belts is small, it is possible to achieve the same state as when there are many belts, so it is possible to reduce variations in separation time.

Based on the above-mentioned results, the separation process of the flat belt bundle on the shirt 21 (Fig. 2.5) side constructed as described above will be described in detail below.

First, hook the flat belt bundle (SO pieces) 7A onto the Z point of shirt 21A in Fig. 2, and then attach the shaft 2
1 A is rotated by a motor (not shown) at 300 rpm. Due to this rotation, the belt bundle 7A is loosened in a few seconds and there is no overlapping, so that the belt 7 is spread uniformly and the twisting and entanglement of the belt 7 is also eliminated.

In this state, after the flat belt 7 has advanced to the escapement 3° position, the escapement 30 is operated in the order described with reference to FIG.

The belt 7 is sent out one by one or several at a time to a shirt (shirt) 21B having a spiral groove slightly wider than the belt width. Since the shaft 21B is rotated at a low speed by the motor, the escaped several flat belts 7 are connected to the shirt (2).
Since it enters the spiral groove of 1B, it is transferred reliably. Since the spiral grooves of the above-mentioned shirt) 21B are formed at a short pitch, even if several flat belts 7 enter the wave grooves at the same time, there is an effect of separating them one by one. The flat belts 7 are reliably discharged one by one from the tip. Since 21 B is independent, it is possible to stop the rotation at any time, so flat heald 7
You can control the discharge at any time.

By separating the flat belt bundle 7A in this way),
When the number of flat belts 7 on the shaft 21E decreases, the sensor 40 detects the rearmost flat belt 7. The belt 7
is sent forward from a predetermined position, the pressing stopper 32 of the pressing portion 31 is raised in the direction of the shaft 21A, and then the pressing stopper 32 is advanced in the direction of the escapement 30 to press the flat belt 7. . Then, the distance between the remaining flat belts is reduced, and the tact in which the flat belts are escaped by the escapement 30 allows stable separation to be performed in the same way as when there are many flat belts.

(Effects of the Invention) As explained above, according to the present invention, belts supplied in a bundle can be loosened and separated one by one reliably and stably, and the variation in one separation time can be reduced. can do.

Further, according to the present invention, there is an advantage that belt separation can be easily automated.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the belt separation device of the present invention, FIGS. The figure is an explanatory diagram of the belt separation state by Shirt IC, Figure 6 is an explanatory diagram showing the operation of the escapement, Figure 7 is a failure of the escapement, 11.8 Figure 11. Figure 9 is a perspective view of a conventional belt separation and alignment device; Figures 10 and 1) are explanatory diagrams of the principle of belt alignment; Figure 12 is a diagram showing the helical shape of the shaft in Figure 1; A partially enlarged view of the groove, Figure 1K13, is a diagram showing the relationship between the rotational speed of the same shaft and the regular feed speed. 20, 21... Shaft 絽, 29... Stopper almost 1 figure Figure 4 Shizuku S figure 6 figure 7 figure A -m-, -111 no Liu figure 9

Claims (1)

[Claims] A pair of shafts each having long-pitch and short-pitch spiral grooves that are rotatably provided concentrically and separately, and a pair that moves up and down alternately with respect to the boundary between the two shafts to control the amount of belt feed. an escapement having a stopper, a sensor that detects the belt position, and a pressing section that presses the rearmost belt in the direction of the escapement. A belt separation device characterized in that the extrusion section is operated by.